Hello,
I am currently working on integrating a third-party REST API with our internal system. The API uses OAuth 2.0 for authentication; and I have faced an issue where the access token seems to expire more frequently than expected. 
Even after following the standard token refresh mechanism; the token sometimes fails to refresh automatically; leading to 401 Unauthorized errors.
I have checked for common causes such as incorrect scopes / client credentials; but the problem persists intermittently.
Could this be due to server-side settings / rate-limiting issues? What debugging steps can I take to identify the root cause of this token expiry issue?
I have checked https://ocen.discussion.ispirt.in/t/about-the-api-and-interpretation-category/21-salesforce cpq discussions related api and interpretation but still need help.
Any advice on handling token management more efficiently in such integrations would be highly appreciated.
Thank you! 